Chris Lattner 53af2d13e7 reenable the piece that turns trunc(zext(x)) -> x even if zext has multiple uses, ...

codegen has no apparent problem with the trunc version of this, because it turns
into a simple subreg idiom


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93202 91177308-0d34-0410-b5e6-96231b3b80d8

2010-01-11 22:49:40 +00:00

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